Power supply control circuit, battery protection board and battery

Abstract

The utility model discloses a power supply control circuit, a protection board of a battery and the battery, which belong to the technical field of batteries, and comprise a control module and a switch module, the switch module comprises a first switch device and a second switch device, and the first switch device and the second switch device are used for controlling the protection board to be powered off. Due to the isolation effect of the first switching device and the second switching device, the influence of abnormity of the first control signal output by the control module on the protection board is reduced, so that compared with the prior art that the protection board is controlled to be powered off through one switching device, the protection board is controlled to be powered off through the first switching device and the second switching device; and the influence of abnormity of the first control signal output by the control module on the protection plate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a power supply control circuit, the protection board of battery and battery. BACKGROUND

[0002] The use of the electric device needs the charge and discharge of the battery, and the battery is usually provided with a protection board of the battery, which is used for monitoring and managing the charge and discharge process of the battery to protect the battery from the adverse conditions such as overcharge, overdischarge, overcurrent and short circuit, and ensure the safe, stable and efficient operation of the battery.

[0003] It should be noted that the battery is connected to the electric device through a connector to realize the whole assembly of the battery.

[0004] In the prior art, the battery is electrically connected to the protection board of the battery through a switching device, and the control module is electrically connected to the switching device. Before the battery is connected to the electric device through the connector, the switching device is turned off by the control module to make the protection board of the battery lose power. When the battery is connected to the electric device through the connector, the switching device is turned on by the control module to make the battery supply power to the protection board of the battery.

[0005] However, in actual production, the inventors have found that in the prior art, at least the following problems exist: Since the battery is electrically connected to the protection board of the battery through a switching device, and the control module is electrically connected to the switching device, the abnormal signals of the control module affect the protection board of the battery through the switching device. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of power supply control circuit, the protection board of battery and battery, at least solve the problem that in prior art, since battery is electrically connected to the protection board of the battery through a switching device, and the control module is electrically connected to the switching device, the abnormal signals of the control module affect the protection board of the battery through the switching device.

[0007] To solve the above technical problems, the utility model is realized as follows:

[0008] Firstly, the utility model provides a kind of power supply control circuit, comprising: control module, switching module, the switching module includes first switching device, second switching device;

[0009] The control module is electrically connected to the first switching device, and the control module is electrically connected to an external power supply and a connector of the external power supply. In the case that the connector is empty, the first switching device is controlled to be in a first state.

[0010] The first switch device is electrically connected with the second switch device, and the first switch device is used for being electrically connected with the external power supply, and the second switch device is controlled to be in a second state when the first switch device is in the first state.

[0011] The second switch device is used for being electrically connected with the external power supply and a protection board of the external power supply respectively, and the protection board is controlled to be powered off when the second switch device is in the second state.

[0012] Optionally, the control module comprises a third switch device, a first resistor, a second resistor, a third resistor and a fourth resistor; a first end of the third switch device is electrically connected with a first end of the first resistor and a control end of the switch module respectively, a second end of the third switch device is grounded, a control end of the third switch device is electrically connected with a first end of the third resistor, the third switch device is used for disconnecting the first end of the third switch device from the second end of the third switch device when the control end of the third switch device is at a low level, and the third switch device is used for electrically connecting the first end of the third switch device with the second end of the third switch device when the control end of the third switch device is at a high level; a second end of the first resistor is electrically connected with a positive pole of the external power supply; a first end of the second resistor is electrically connected with the control end of the third switch device, and a second end of the second resistor is grounded; a second end of the third resistor is electrically connected with a ground end of the connector; a first end of the fourth resistor is electrically connected with the positive pole of the external power supply, and a second end of the fourth resistor is electrically connected with the second end of the third resistor.

[0013] Optionally, the third switch device is an NPN triode, the first end of the third switch device is a collector of the NPN triode, the second end of the third switch device is an emitter of the NPN triode, and the control end of the third switch device is a base of the NPN triode.

[0014] Optionally, the control module comprises a fourth switching device, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor; a first end of the fourth switching device is electrically connected with a positive pole of the external power supply; a second end of the fourth switching device is electrically connected with a first end of the seventh resistor; a control end of the fourth switching device is electrically connected with a first end of the sixth resistor; the fourth switching device is used for disconnecting the first end of the fourth switching device from the second end of the fourth switching device when the control end of the fourth switching device is at a high level; the fourth switching device is used for electrically connecting the first end of the fourth switching device with the second end of the fourth switching device when the control end of the fourth switching device is at a low level; a first end of the fifth resistor is electrically connected with the positive pole of the external power supply; a second end of the fifth resistor is electrically connected with the first end of the sixth resistor; a second end of the sixth resistor is electrically connected with a ground end of the connector; a second end of the seventh resistor is grounded; a first end of the eighth resistor is electrically connected with the positive pole of the external power supply; and a second end of the eighth resistor is electrically connected with the second end of the sixth resistor.

[0015] Optionally, the fourth switching device is a PNP type triode; the first end of the fourth switching device is an emitter of the PNP type triode; the second end of the fourth switching device is a collector of the PNP type triode; and the control end of the fourth switching device is a base of the PNP type triode.

[0016] Optionally, the switching module further comprises a ninth resistor and a tenth resistor; the first state is off, and the second state is off; a control end of the first switching device is electrically connected with an output end of the control module; a first end of the first switching device is electrically connected with a first end of the ninth resistor; a second end of the first switching device is grounded; the first switching device is used for disconnecting the first end of the first switching device from the second end of the first switching device when the control end of the first switching device is at a low level; the first switching device is used for electrically connecting the first end of the first switching device with the second end of the first switching device when the control end of the first switching device is at a high level; a control end of the second switching device is electrically connected with the first end of the ninth resistor and the first end of the first switching device respectively; a first end of the second switching device is electrically connected with a positive pole of the external power supply; a second end of the second switching device is electrically connected with a first end of the tenth resistor; the second switching device is used for disconnecting the first end of the second switching device from the second end of the second switching device when the control end of the second switching device is at a high level; the second switching device is used for electrically connecting the first end of the second switching device with the second end of the second switching device when the control end of the second switching device is at a low level; a second end of the ninth resistor is electrically connected with the positive pole of the external power supply; and a second end of the tenth resistor is used for being electrically connected with the protection plate.

[0017] Optionally, the first switch device is an NMOS tube, the first end of the first switch device is a drain of the NMOS tube, the second end of the first switch device is a source of the NMOS tube, and the control end of the first switch device is a gate of the NMOS tube; the second switch device is a PMOS tube, the first end of the second switch device is a source of the PMOS tube, the second end of the second switch device is a drain of the PMOS tube, and the control end of the second switch device is a gate of the PMOS tube.

[0018] Optionally, the control module is further configured to control the first switch device to be in a third state when the connector is electrically connected to the electrical equipment; the first switch device is further configured to control the second switch device to be in a fourth state when the first switch device is in the third state; and the second switch device is further configured to control the protection plate to be powered on when the second switch device is in the fourth state.

[0019] In a second aspect, the utility model provides a protection plate of battery, including the power supply control circuit of as described in first aspect.

[0020] In a third aspect, the utility model provides a battery, including the protection plate of battery of as described in second aspect.

[0021] In the embodiment of the utility model, the first switch device and the second switch device are used to control the protection plate to be powered off, and due to the isolation of the first switch device and the second switch device, the influence of the first control signal output by the control module on the protection plate is reduced, so compared with the prior art in which one switch device is used to control the protection plate to be powered off, the influence of the first control signal output by the control module on the protection plate is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings needed to be used in the description of the embodiment of the utility model will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without the creative labor of the ordinary skilled in the art.

[0023] Figure 1 A structural schematic diagram of the power supply control circuit provided by the embodiment of the utility model is shown in the figure.

[0024] Figure 2 A specific structural schematic diagram of the power supply control circuit provided by the embodiment of the utility model is shown in the figure.

[0025] Figure 3 Another specific structure schematic view of the power supply control circuit is provided for the embodiment of the utility model.

[0026] Reference signs:

[0027] 10-control module; 20-switching module; 30-external power supply; 40-connector; 50-protection board. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below by combining with the drawings and specific embodiments.

[0029] With reference to Figure 1 The embodiment of the utility model provides a kind of power supply control circuit, comprising: control module 10, switching module 20;The control module 10 is electrically connected with the switching module 20, the control module 10 is used to be electrically connected with external power supply 30, the connector 40 of the external power supply 30 respectively, in the case where the connector 40 is vacant, first control signal is sent to the switching module 20;The switching module 20 is used to be electrically connected with the external power supply 30, the protection board 50 of the external power supply 30 respectively, in the case where the first control signal is acquired, control protection board 50 is powered off.

[0030] It needs to be explained that connector 40 is vacant, i.e. the connector 40 of external power supply 30 is not connected with electric equipment;Control protection board 50 is powered off, i.e. battery is disconnected with protection board 50, so that battery does not supply power to the protection board 50 of battery.

[0031] In some embodiments, external power supply 30 can be direct current power supply, for example, external power supply 30 can be battery, and the protection board 50 of external power supply 30 can be the protection board 50 of battery.

[0032] Specifically, the switch module 20 comprises a first switch device Q1 and a second switch device Q2; the control module 10 is electrically connected with the first switch device Q1, and the control module 10 is electrically connected with an external power supply 30 and a connector 40 of the external power supply 30 respectively; in the case that the connector 40 is vacant, the first switch device Q1 is controlled to be in a first state; the first switch device Q1 is electrically connected with the second switch device Q2, and the first switch device Q1 is electrically connected with the external power supply 30; in the case that the first switch device Q1 is in the first state, the second switch device Q2 is controlled to be in a second state; and the second switch device Q2 is electrically connected with the external power supply 30 and a protection board 50 of the external power supply 30 respectively; in the case that the second switch device Q2 is in the second state, the protection board 50 is controlled to be powered off.

[0033] In some embodiments, the first state is off, and the second state is off.

[0034] In the embodiment of the utility model, through the control module 10 in the case that the connector 40 is vacant, the first switch device Q1 is controlled to be in the first state, then through the first switch device Q1 in the case that the first switch device Q1 is in the first state, the second switch device Q2 is controlled to be in the second state, and then through the second switch device Q2 in the case that the second switch device Q2 is in the second state, the protection board 50 of the external power supply 30 (for example, a battery) is powered off, so that before the battery is connected to the electric equipment through the connector 40, the protection board 50 of the battery is powered off, and the power of the battery is saved.

[0035] Optionally, in some embodiments, the control module 10 is further used for sending a second control signal to the switch module 20 in the case that the connector 40 is electrically connected with the electric equipment; and the switch module 20 is further used for controlling the protection board 50 to be powered on in the case that the second control signal is acquired.

[0036] It should be noted that the level of the first control signal is opposite to the level of the second control signal.

[0037] Specifically, the switch module 20 comprises a first switch device Q1 and a second switch device Q2; the control module 10 is further used for controlling the first switch device Q1 to be in a third state in the case that the connector 40 is electrically connected with the electric equipment; the first switch device Q1 is further used for controlling the second switch device Q2 to be in a fourth state in the case that the first switch device Q1 is in the third state; and the second switch device Q2 is further used for controlling the protection board 50 to be powered on in the case that the second switch device Q2 is in the fourth state.

[0038] In some embodiments, the third state is on, and the fourth state is on.

[0039] In the embodiment of the utility model, the first switch device and the second switch device are used to control the power-off of the protection board, and due to the isolation of the first switch device and the second switch device, the influence of the abnormal first control signal output by the control module on the protection board is reduced, so compared with the prior art in which one switch device is used to control the power-off of the protection board, the use of the first switch device and the second switch device to control the power-off of the protection board reduces the influence of the abnormal first control signal output by the control module on the protection board.

[0040] In addition, by controlling the third switch device Q3 to be in the third state when the connector 40 of the external power supply 30 is electrically connected to the electrical equipment, and then controlling the fourth switch device Q4 to be in the fourth state when the third switch device Q3 is in the third state, and then controlling the protection board 50 of the external power supply 30 to be powered on when the fourth switch device Q4 is in the fourth state, the protection board 50 of the external power supply 30 is controlled to be powered on when the connector 40 of the external power supply 30 is electrically connected to the electrical equipment, so that the external power supply 30 is protected by the protection board 50 of the external power supply 30.

[0041] Optionally, with reference to Figure 2 In some embodiments, the control module 10 includes a third switch device Q3, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; the first end of the third switch device Q3 is electrically connected to the first end of the first resistor R1 and the control end of the switch module 20, the second end of the third switch device Q3 is grounded, the control end of the third switch device Q3 is electrically connected to the first end of the third resistor R3, and the third switch device Q3 is used to disconnect the first end of the third switch device Q3 from the second end of the third switch device Q3 when the control end of the third switch device Q3 is at a low level; and the first end of the third switch device Q3 is electrically connected to the second end of the third switch device Q3 when the control end of the third switch device Q3 is at a high level; the second end of the first resistor R1 is electrically connected to the positive electrode 301 of the external power supply 30; the first end of the second resistor R2 is electrically connected to the control end of the third switch device Q3, and the second end of the second resistor R2 is grounded; the second end of the third resistor R3 is electrically connected to the ground end P5 of the connector 40; the first end of the fourth resistor R4 is electrically connected to the positive electrode 301 of the external power supply 30, and the second end of the fourth resistor R4 is electrically connected to the second end of the third resistor R3.

[0042] It should be noted that the negative electrode 302 of the external power supply 30 is grounded; the first resistor R1 is a current-limiting resistor, the second resistor R2 is a pull-down resistor, the third resistor R3 is a protection resistor, and the fourth resistor R4 is a pull-up resistor.

[0043] In the case where the connector 40 of the external power supply 30 is connected with the electrical equipment, the ground end P5 of the connector 40 is grounded by being electrically connected with the ground end of the electrical equipment; in the case where the connector 40 of the external power supply 30 is not connected with the electrical equipment, the ground end P5 of the connector 40 is left empty.

[0044] In the embodiment of the utility model, in the case where the connector 40 of the external power supply 30 is not connected with the electrical equipment, the control end of the third switching device Q3 is pulled up by the fourth resistor R4, so that the control end of the third switching device Q3 is high level, the third switching device Q3 is turned on, that is, the first end of the third switching device Q3 is electrically connected with the second end of the third switching device Q3, so that the control end of the switching module 20 is grounded, that is, the first control signal of low level is sent to the control end of the switching module 20; in the case where the connector 40 of the external power supply 30 is connected with the electrical equipment, the control end of the third switching device Q3 is pulled down by the ground end P5 of the connector 40, so that the control end of the third switching device Q3 is low level, the third switching device Q3 is turned off, that is, the first end of the third switching device Q3 is disconnected with the second end of the third switching device Q3, so that the control end of the switching module 20 is pulled up by the first resistor R1, that is, the second control signal of high level is sent to the control end of the switching module 20.

[0045] Optionally, in some embodiments, the third switching device Q3 is an NPN type triode, the first end of the third switching device Q3 is the collector of the NPN type triode, the second end of the third switching device Q3 is the emitter of the NPN type triode, and the control end of the third switching device Q3 is the base of the NPN type triode.

[0046] It should be noted that the NPN type triode is composed of three semiconductor blocks, including two N (Negative Electrcity, negative electricity) type semiconductor blocks (electron type semiconductor blocks) and one P (Positive Electricity, positive electricity) type semiconductor block (hole type semiconductor block), the P type semiconductor block is in the middle, and the two N type semiconductor blocks are on both sides.

[0047] Optionally, referring to Figure 3In some embodiments, the control module 10 comprises a fourth switching device Q4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8; the first end of the fourth switching device Q4 is electrically connected to the positive pole 301 of the external power supply 30, the second end of the fourth switching device Q4 is electrically connected to the first end of the seventh resistor R7, the control end of the fourth switching device Q4 is electrically connected to the first end of the sixth resistor R6, and the fourth switching device Q4 is used to disconnect the first end of the fourth switching device Q4 from the second end of the fourth switching device Q4 when the control end of the fourth switching device Q4 is at a high level; and the first end of the fourth switching device Q4 is electrically connected to the second end of the fourth switching device Q4 when the control end of the fourth switching device Q4 is at a low level; the first end of the fifth resistor R5 is electrically connected to the positive pole 301 of the external power supply 30, and the second end of the fifth resistor R5 is electrically connected to the first end of the sixth resistor R6; the second end of the sixth resistor R6 is electrically connected to the ground end P5 of the connector 40; the second end of the seventh resistor R7 is grounded; the first end of the eighth resistor R8 is electrically connected to the positive pole 301 of the external power supply 30, and the second end of the eighth resistor R8 is electrically connected to the second end of the sixth resistor R6.

[0048] It should be noted that the fifth resistor R5 is a voltage dividing resistor, the sixth resistor R6 is a protection resistor, the seventh resistor R7 is a pull-down resistor, and the eighth resistor R8 is a pull-up resistor.

[0049] In the embodiments of the utility model, when the connector 40 of the external power supply 30 is not connected to the electrical equipment, the control end of the third switching device Q3 is pulled high through the eighth resistor R8, so that the control end of the third switching device Q3 is at a high level, the third switching device Q3 is turned off, that is, the first end of the third switching device Q3 is disconnected from the second end of the third switching device Q3, so that the control end of the switching module 20 is grounded through the seventh resistor R7, that is, a low-level first control signal is sent to the control end of the switching module 20; when the connector 40 of the external power supply 30 is connected to the electrical equipment, the control end of the third switching device Q3 is pulled low through the ground end P5 of the connector 40, so that the control end of the third switching device Q3 is at a low level, the third switching device Q3 is turned on, that is, the first end of the third switching device Q3 is electrically connected to the second end of the third switching device Q3, so that the control end of the switching module 20 is pulled high, that is, a high-level second control signal is sent to the control end of the switching module 20.

[0050] Optionally, in some embodiments, the fourth switching device Q4 is a PNP type triode, the first end of the fourth switching device Q4 is the emitter of the PNP type triode, the second end of the fourth switching device Q4 is the collector of the PNP type triode, and the control end of the fourth switching device Q4 is the base of the PNP type triode.

[0051] It should be noted that the PNP type triode is composed of three semiconductor blocks, including two P-type semiconductor blocks and one N-type semiconductor block, the N-type semiconductor block is in the middle, and the two P-type semiconductor blocks are on both sides.

[0052] Optionally, in some embodiments, the switching module 20 includes a first switching device Q1, a second switching device Q2, a ninth resistor R9, and a tenth resistor R10; the first state is off, and the second state is off; the control end of the first switching device Q1 is electrically connected to the output end of the control module 10, the first end of the first switching device Q1 is electrically connected to the first end of the ninth resistor R9, the second end of the first switching device Q1 is grounded, the first switching device Q1 is used to disconnect the first end of the first switching device Q1 from the second end of the first switching device Q1 when the control end of the first switching device Q1 is at a low level, and electrically connect the first end of the first switching device Q1 to the second end of the first switching device Q1 when the control end of the first switching device Q1 is at a high level; the control end of the second switching device Q2 is electrically connected to the first end of the ninth resistor R9 and the first end of the first switching device Q1, respectively, the first end of the second switching device Q2 is electrically connected to the positive electrode 301 of the external power supply 30, the second end of the second switching device Q2 is electrically connected to the first end of the tenth resistor R10, the second switching device Q2 is used to disconnect the first end of the second switching device Q2 from the second end of the second switching device Q2 when the control end of the second switching device Q2 is at a high level, and electrically connect the first end of the second switching device Q2 to the second end of the second switching device Q2 when the control end of the second switching device Q2 is at a low level; the second end of the ninth resistor R9 is electrically connected to the positive electrode 301 of the external power supply 30; and the second end of the tenth resistor R10 is used to be electrically connected to the protection plate 50.

[0053] It should be noted that the control end of the first switching device Q1, i.e. the control end of the switching module 20, the ninth resistor R9 is a pull-up resistor, and the tenth resistor R10 is a protection resistor.

[0054] In some embodiments, the switch module 20 further comprises a first capacitor C1, a first end of the first capacitor C1 is electrically connected with a second end of the tenth resistor R10, a second end of the first capacitor C1 is used for being electrically connected with the protection plate 50 of the external power supply 30, and the tenth resistor R10 and the first capacitor C1 constitute a resistor-capacitor (RC) filter.

[0055] In the embodiment of the utility model, under the condition that the connector 40 of the external power supply 30 is not connected with the electric equipment, the low-level first control signal is sent to the control end of the first switch device Q1, so that the first switch device Q1 is turned off, that is, the first end of the first switch device Q1 is disconnected with the second end of the first switch device Q1, then the control end of the second switch device Q2 is pulled up through the ninth resistor R9, the second switch device Q2 is turned on, that is, the first end of the second switch device Q2 is electrically connected with the second end of the second switch device Q2, so that the external power supply 30 supplies power to the protection plate 50 of the external power supply 30 through the second switch device Q2; under the condition that the connector 40 of the external power supply 30 is connected with the electric equipment, the high-level second control signal is sent to the control end of the first switch device Q1, so that the first switch device Q1 is turned on, that is, the first end of the first switch device Q1 is electrically connected with the second end of the first switch device Q1, then the control end of the second switch device Q2 is pulled down through the first switch device Q1, the second switch device Q2 is turned off, that is, the first end of the second switch device Q2 is disconnected with the second end of the second switch device Q2, so that the external power supply 30 is disconnected with the protection plate 50 of the external power supply 30, and the external power supply 30 does not supply power to the protection plate 50 of the external power supply 30.

[0056] Optionally, in some embodiments, the first switch device Q1 is an NMOS tube, the first end of the first switch device Q1 is a drain of the NMOS tube, the second end of the first switch device Q1 is a source of the NMOS tube, and the control end of the first switch device Q1 is a gate of the NMOS tube; the second switch device Q2 is a PMOS tube, the first end of the second switch device Q2 is a source of the PMOS tube, the second end of the second switch device Q2 is a drain of the PMOS tube, and the control end of the second switch device Q2 is a gate of the PMOS tube.

[0057] It should be noted that the NMOS tube is a negative channel metal oxide semiconductor tube (Negative channel Metal Oxide Semiconductor), and the PMOS tube is a positive channel metal oxide semiconductor tube (positive channel Metal Oxide Semiconductor).

[0058] Optionally, in some embodiments, the protection board 50 of the external power supply 30 comprises a power supply protection chip U1, a switch chip U2, an eleventh resistor R11, a twelfth resistor R12, a second capacitor C2, a third capacitor C3, a fuse F1, the switch chip U2 comprises a fifth switching device Q5 and a sixth switching device Q6, both of which are NMOS tubes; the positive power input end VDD of the power supply protection chip U1 is electrically connected with the second end of the tenth resistor R10, the negative power input end VSS of the power supply protection chip U1 is respectively electrically connected with the second end of the first capacitor C1, the first end of the fuse F1 and the first end of the twelfth resistor R12, the overcurrent detection end VINI of the power supply protection chip U1 is electrically connected with the second end of the twelfth resistor R12, the discharge control end DO of the power supply protection chip U1 is electrically connected with the gate of the fifth switching device Q5, the charging control end of the power supply protection chip U1 is electrically connected with the gate of the sixth switching device Q6, and the voltage detection end IO of the power supply protection chip U1 is electrically connected with the first end of the eleventh resistor R11.

[0059] The source of the fifth switching device Q5 is electrically connected with the second end of the twelfth resistor R12, and the drain of the fifth switching device Q5 is electrically connected with the drain of the fifth switching device Q5; the source of the sixth switching device Q6 is grounded; the second end of the eleventh resistor R11 is grounded; the first end of the second capacitor C2 is electrically connected with the second end of the twelfth resistor R12, the second end of the second capacitor C2 is electrically connected with the first end of the third capacitor C3, and the second end of the third capacitor C3 is grounded; the second end of the fuse F1 is grounded, and the second end of the fuse F1 is electrically connected with the negative electrode 302 of the external power supply 30.

[0060] For example, the model of the power supply protection chip U1 can be S-82F1BAN-I6T1U, and the model of the switch chip U2 can be CJ4506SP.

[0061] In some embodiments, the terminals of the connector 40 of the external power supply 30 further comprise a first positive terminal P1 of the connector 40, a second positive terminal P2 of the connector 40, a third positive terminal P3 of the connector 40, a null terminal P4 of the connector 40, an identification terminal P6 of the connector 40, a through-hole terminal P7 of the connector 40, a first negative terminal P8 of the connector 40, a second negative terminal P9 of the connector 40, and a third negative terminal P10 of the connector 40; the power supply control circuit further comprises a fourth capacitor C4, a fifth capacitor C5, a thirteenth resistor R13, a fourteenth resistor R14, and a transient voltage suppressor TVS1 (TVS, Transient Voltage Suppressor).

[0062] The positive pole 301 of the external power supply 30 is electrically connected with the first positive pole end P1 of the connector 40, the second positive pole end P2 of the connector 40 and the third positive pole end P3 of the connector 40 respectively; the empty end P4 of the connector 40 is empty; the first negative pole end P8 of the connector 40, the second negative pole end P9 of the connector 40 and the third negative pole end P10 of the connector 40 are grounded; the first end of the fourth capacitor C4 is electrically connected with the first positive pole end P1 of the connector 40, the second positive pole end P2 of the connector 40 and the third positive pole end P3 of the connector 40 respectively, the second end of the fourth capacitor C4 is electrically connected with the first end of the fifth capacitor C5, and the second end of the fifth capacitor C5 is grounded; the first end of the thirteenth resistor R13 is electrically connected with the identification end P6 of the connector 40, and the second end of the thirteenth resistor R13 is grounded; the first end of the fourteenth resistor R14 is electrically connected with the through-hole end P7 of the connector 40, and the second end of the fourteenth resistor R14 is grounded; the first end of the transient voltage suppressor TVS1 is electrically connected with the through-hole end P7 of the connector 40, and the second end of the transient voltage suppressor TVS1 is grounded.

[0063] The utility model embodiment further provides a protection board of battery.

[0064] The specific implementation process of the power supply control circuit in the protection board of battery is similar to the specific implementation process of the power supply control circuit, and will not be repeated here.

[0065] The utility model embodiment further provides a battery comprising the protection board of battery.

[0066] The specific implementation process of the power supply control circuit in the battery is similar to the specific implementation process of the power supply control circuit, and will not be repeated here.

[0067] In the related art, the protection board of battery comprises a single-chip microcomputer and a driving circuit and other multi-stage protection structures, and the single-chip microcomputer and the driving circuit are used to control the battery to supply power externally, and the self-consumption power of the single-chip microcomputer and the driving circuit is too large when the battery does not supply power to the electrical device, which is not conducive to the storage of the battery.

[0068] Through the utility model embodiment, the protection board 50 of the battery is powered off before the battery is connected to the electrical device through the connector 40, the problem of too fast power consumption of the battery when not in use is solved, and the possibility of the battery being unable to be tested due to too long storage time before the whole machine is assembled and the voltage of the battery being too low is reduced.

[0069] In the embodiment of the utility model, through the first switch device, the second switch device two switch devices control protection board power off, because the isolation of first switch device, second switch device, reduce the influence of the first control signal abnormality of control module output to protection board, therefore, compared with prior art through a switch device control protection board power off, through the first switch device, the second switch device two switch devices control protection board power off, reduce the influence of the first control signal abnormality of control module output to protection board.

[0070] In addition, by the control module 10 in the connector 40 empty condition, control first switch device Q1 in the first state, then through the first switch device Q1 in the first switch device Q1 in the first state, control second switch device Q2 in the second state, again through the second switch device Q2 in the second switch device Q2 in the second state, control the protection board 50 of external power supply 30 (for example battery) power off, so that before the battery is connected to the electrical equipment through the connector 40, the protection board 50 of battery power off, save the battery power.

[0071] Finally, it should also be noted that in this paper, such as "first" and "second" and other relational terms are only used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or includes elements inherent in such process, method, article or terminal device.

[0072] The above is only the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0073] The above is only the specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited by the protection scope of the claims.

Claims

1. A power supply control circuit, characterized in that: include: A control module (10), a switch module (20), wherein the switch module (20) comprises a first switch device (Q1) and a second switch device (Q2); The control module (10) is electrically connected to the first switching device (Q1), and the control module (10) is used to be electrically connected to an external power source (30) and a connector (40) of the external power source (30), respectively, and to control the first switching device (Q1) to be in a first state when the connector (40) is unused; The first switching device (Q1) is electrically connected to the second switching device (Q2), the first switching device (Q1) is used to be electrically connected to the external power source (30), and when the first switching device (Q1) is in the first state, the second switching device (Q2) is controlled to be in the second state; The second switching device (Q2) is used to be electrically connected to the external power supply (30) and the protection board (50) of the external power supply (30), respectively, and when the second switching device (Q2) is in the second state, the protection board (50) is controlled to be powered off.

2. The power supply control circuit according to claim 1, characterized in that: The control module (10) comprises a third switch device (Q3), a first resistor (R1), a second resistor (R2), a third resistor (R3), and a fourth resistor (R4); The first end of the third switch device (Q3) is electrically connected to the first end of the first resistor (R1) and the control end of the switch module (20), respectively; the second end of the third switch device (Q3) is grounded; the control end of the third switch device (Q3) is electrically connected to the first end of the third resistor (R3); the third switch device (Q3) is used to disconnect the first end of the third switch device (Q3) from the second end of the third switch device (Q3) when the control end of the third switch device (Q3) is at a low level; and to electrically connect the first end of the third switch device (Q3) to the second end of the third switch device (Q3) when the control end of the third switch device (Q3) is at a high level; The second end of the first resistor (R1) is electrically connected to the positive electrode (301) of the external power supply (30); A first end of the second resistor (R2) is electrically connected to a control end of the third switch device (Q3), and a second end of the second resistor (R2) is grounded; The second end of the third resistor (R3) is electrically connected to the ground terminal (P5) of the connector (40); A first end of the fourth resistor (R4) is electrically connected to the positive electrode (301) of the external power supply (30), and a second end of the fourth resistor (R4) is electrically connected to the second end of the third resistor (R3).

3. The power supply control circuit according to claim 2, characterized in that: The third switching device (Q3) is an NPN transistor, the first end of the third switching device (Q3) is the collector of the NPN transistor, the second end of the third switching device (Q3) is the emitter of the NPN transistor, and the control end of the third switching device (Q3) is the base of the NPN transistor.

4. The power supply control circuit according to claim 1, wherein: The control module (10) includes a fourth switch device (Q4), a fifth resistor (R5), a sixth resistor (R6), a seventh resistor (R7), and an eighth resistor (R8); The first end of the fourth switch device (Q4) is electrically connected to the positive electrode (301) of the external power supply (30), the second end of the fourth switch device (Q4) is electrically connected to the first end of the seventh resistor (R7), and the control end of the fourth switch device (Q4) is electrically connected to the first end of the sixth resistor (R6). The fourth switch device (Q4) is used to disconnect the first end of the fourth switch device (Q4) from the second end of the fourth switch device (Q4) when the control end of the fourth switch device (Q4) is at a high level; and to electrically connect the first end of the fourth switch device (Q4) to the second end of the fourth switch device (Q4) when the control end of the fourth switch device (Q4) is at a low level; A first end of the fifth resistor (R5) is electrically connected to the positive electrode (301) of the external power supply (30), and a second end of the fifth resistor (R5) is electrically connected to a first end of the sixth resistor (R6); The second end of the sixth resistor (R6) is electrically connected to the ground terminal (P5) of the connector (40); A second end of the seventh resistor (R7) is grounded; A first end of the eighth resistor (R8) is electrically connected to the positive electrode (301) of the external power supply (30), and a second end of the eighth resistor (R8) is electrically connected to the second end of the sixth resistor (R6).

5. The power supply control circuit according to claim 4, characterized in that: The fourth switching device (Q4) is a PNP-type transistor, the first end of the fourth switching device (Q4) is the emitter of the PNP-type transistor, the second end of the fourth switching device (Q4) is the collector of the PNP-type transistor, and the control end of the fourth switching device (Q4) is the base of the PNP-type transistor.

6. The power supply control circuit according to claim 1, characterized in that: The switch module (20) further includes a ninth resistor (R9) and a tenth resistor (R10); the first state is off, and the second state is off; The control end of the first switch device (Q1) is electrically connected to the output end of the control module (10), the first end of the first switch device (Q1) is electrically connected to the first end of the ninth resistor (R9), the second end of the first switch device (Q1) is grounded, and the first switch device (Q1) is used to disconnect the first end of the first switch device (Q1) from the second end of the first switch device (Q1) when the control end of the first switch device (Q1) is at a low level; and to electrically connect the first end of the first switch device (Q1) to the second end of the first switch device (Q1) when the control end of the first switch device (Q1) is at a high level; The control end of the second switch device (Q2) is electrically connected to the first end of the ninth resistor (R9) and the first end of the first switch device (Q1), respectively; the first end of the second switch device (Q2) is electrically connected to the positive electrode (301) of the external power supply (30); the second end of the second switch device (Q2) is electrically connected to the first end of the tenth resistor (R10); the second switch device (Q2) is used to disconnect the first end of the second switch device (Q2) from the second end of the second switch device (Q2) when the control end of the second switch device (Q2) is at a high level; and to electrically connect the first end of the second switch device (Q2) to the second end of the second switch device (Q2) when the control end of the second switch device (Q2) is at a low level; The second end of the ninth resistor (R9) is electrically connected to the positive electrode (301) of the external power supply (30); The second end of the tenth resistor (R10) is used for being electrically connected to the protection plate (50).

7. The power supply control circuit according to claim 6, characterized in that: The first switching device (Q1) is an NMOS transistor, the first end of the first switching device (Q1) is the drain of the NMOS transistor, the second end of the first switching device (Q1) is the source of the NMOS transistor, and the control end of the first switching device (Q1) is the gate of the NMOS transistor; The second switch device (Q2) is a PMOS tube, the first end of the second switch device (Q2) is the source of the PMOS tube, the second end of the second switch device (Q2) is the drain of the PMOS tube, and the control end of the second switch device (Q2) is the gate of the PMOS tube.

8. The power supply control circuit according to claim 1, wherein: The control module (10) is further configured to control the first switch device (Q1) to be in a third state when the connector (40) is electrically connected to an electrical device; The first switching device (Q1) is further configured to control the second switching device (Q2) to be in a fourth state when the first switching device (Q1) is in the third state; The second switching device (Q2) is further used to control the protection board (50) to be energized when the second switching device (Q2) is in the fourth state.

9. A battery protection plate, characterized in that: The power supply control circuit comprises the power supply control circuit according to any one of claims 1 to 8.

10. A battery, characterized in that: A protective plate for a battery as claimed in claim 9.

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